Using Bohr's postulate, derive the expression for the orbital period of the electron moving in the nth orbit of hydrogen atom.

The angular speed of electron in the nth orbit of hydrogen atom is

The energy of an electron in the nth Bohr orbit of hydrogen atom is

The energy of an electron in nth orbit of hydrogen atom is

State Bohr’s postulates for atomic model and using them derive an expression forthe total energy of an electron revolving in a stationary nth orbit of hydrogen atom.